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The Dark Matter filament between Abell 222/223*

Published online by Cambridge University Press:  12 October 2016

Jörg P. Dietrich ,
Norbert Werner ,
Douglas Clowe ,
Alexis Finoguenov ,
Tom Kitching ,
Lance Miller  and
Aurora Simionescu
Jörg P. Dietrich
Affiliation:
Universitäts-Sternwarte München, Ludwig-Maximilians-Universität München, Scheinerstr. 1, 81679 München, Germany email: [email protected]
Norbert Werner
Affiliation:
Kavli Institute for Particle Astrophysics and Cosmology, Stanford University, 382 Via Pueblo Mall, Stanford, CA 94305-4060, USA
Douglas Clowe
Affiliation:
Dept. of Physics & Astronomy, Ohio University, Clippinger Lab 251B, Athens, OH 45701, USA
Alexis Finoguenov
Affiliation:
Max-Planck-Institut fur extraterrestrische Physik, Giessenbachstraße, 85748 Garching b. München, Germany
Tom Kitching
Affiliation:
Institute for Astronomy, The University of Edinburgh, Royal Observatory, Blackford Hill, Edinburgh EH9 3HJ, U.K.
Lance Miller
Affiliation:
Department of Physics, University of Oxford, The Denys Wilkinson Building, Keble Road, Oxford OX1 3RH, U.K.
Aurora Simionescu
Affiliation:
Kavli Institute for Particle Astrophysics and Cosmology, Stanford University, 382 Via Pueblo Mall, Stanford, CA 94305-4060, USA
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Abstract

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Weak lensing detections and measurements of filaments have been elusive for a long time. The reason is that the low density contrast of filaments generally pushes the weak lensing signal to unobservably low scales. To nevertheless map the dark matter in filaments exquisite data and unusual systems are necessary. SuprimeCam observations of the supercluster system Abell 222/223 provided the required combination of excellent seeing images and a fortuitous alignment of the filament with the line-of-sight. This boosted the lensing signal to a detectable level and led to the first weak lensing mass measurement of a large-scale structure filament. The filament connecting Abell 222 and Abell 223 is now the only one traced by the galaxy distribution, dark matter, and X-ray emission from the hottest phase of the warm-hot intergalactic medium. The combination of these data allows us to put the first constraints on the hot gas fraction in filaments.

Keywords

gravitational lensing: weakgalaxies: clusters: individual (Abell 222, Abell 223)large-scale structure of universe
Type
Contributed Papers
Information
Proceedings of the International Astronomical Union , Volume 11 , Symposium S308: The Zeldovich Universe: Genesis and Growth of the Cosmic Web , June 2014 , pp. 193 - 198
Copyright
Copyright © The Authors 2017 

Footnotes

*

The copyright line contained an error. This has now been corrected in the online version, with an additional correction notice published.

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